Image: Komatiite (weathered surface)

Komatiite (weathered surface)

Komatiite (weathered surface) (9 cm x 6cm). Spinifex Creek, Baadplas, Mpumalanga Province, South Africa.

Stuart Humphreys
© Australian Museum


Komatiite is high in magnesium and crystallised at high temperatures. It commonly displays a spinifex (spiky grass) texture consisting of intergrown skeletal and bladed olivine and pyroxene crystals in a glassy groundmass. Most are Archean in age.


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Tags volcanic, igneous rocks, volcanoes, komatiite, mineralogy, geosciences,